External guard for pneumatic tires.



J. L. LA DRIERE. EXTERNAL GUARD FOR PNEUMATIC-TIRES.

APPLICATION- FILED JAN.21. 1910.

Patented Apr. 26, 1910.

' WITNESSES Unrra PATENT @FFICE.

.IOSEPH L, LA DBIERE, OF ALBUQUERQUE, TERRITORY OF NEW MEXICO.

EXTERNAL GUARD FOR PNEUMATIC TIRES.

Specification of Letters Patent.

Patented A 2c, 1910.

a pneumatic tire, is eflicientin protecting a tire against wear andpuncture, and is provided with hinges the knuckles of which are adaptedto engage the tire witha view of preventing creepin of the armor on thetire and are also at apted to engage the ground with a view ofincreasing the truetion capacity of the armor.

ll'ith the foregoing in mind the invention in all of its details will befully understood from the following description and claim when thesameare read in connection with -the (llaWllH'S accomjanvin and formin B Jn. D part of this specificat on, in which:

Figure l is,aside elevation, partly in section, of a portion of my novelguard as the same appears when properly positioned on a wheel tire. Fig.2 1s a plan view of a portion of the guard. -Fig. 3 is an enlarged sideelevation of one of the end sections. Fig. 4 is a transverse sectiontaken in the plane indicated by the line 4.-4: of Fi 1.

Similar letters designate corresponding parts in all of the views of thedrawings, referring to which:

A is a portion of a wheel. B is a pneumatic tire thereon, and O is mynovelguard as a Whole. The said guard comprises a plurality of sectionsa, hinged together, an end section b hinged to an adjacent section a, anend section a hinged to an adjacent section a, and threaded bolts 21 andnuts 6 throu h the medium of which the end sections b and c areadjustably connected together. In this manner an endless chain or ringis formedcalculated' to entirely surround the tire. 4

Each of the sections a included in the guard G is preferably formed ofsteel and comprises a longitudinal central portion f, a knuckleg at oneend thereof, knuckles h arranged at the o posite end of the portion andcurvilinear skirts 2' extending rom y an intervening s ace,

opposite sides of the portion f. The several sections a are connected'inthe-hinged manner illustratedthat is to say, the knuckle g of each isarranged between the knuckles of an adjacent section, and pintles' aresecured in the alined knuckles g and h; the said pintles beingpreferably headed at their opposite ends, as clearly shown in Figs. 1and 2. By virtue of this construction it will be manifest that the guardis provided 'with the flexibility necessary to enable it to lend itselfto movements of the tire B; and it Will also be manifest that theinwardly extending portions. of the alined knuckles g and I: will serveto engage the tire and. prevent creeping of the guard thereon,-while theexterior portions of the said alined knuckles will, by engaging theground, increase the v traction capacity of the guard.

As will be readily understood from Figs. 1 and 2, each of the'skirts z'is providedat one end with an offset flan e L that is adapted to lap theopposed un' anged end of an adjacent skirt, this'in order to increasethe protection afforded by the skirts to the side portions of the tirewithout detracting from the flexibility of the guard, as a whole.

Each of the end sections b and c is hinged in the manner described'to anend section a, and the end section b is provided with skirts z" havingofl'set flanges is designed to lap the opposed ends of the skirts i onthe adjacent section a, while the end section 0 is arranged to slidelengthwise as a whole under the section b; the inner side of the sectionI) being recessed for that purpose. The offset flanges Is on the skirtsz' of the section a 'that is hlnged to the end section 0 are arranged atthe outer sides of the adjacent ends of the skirts on section 0, asshown and for the purpose before set forth.

The skirts i of the end section b are provided with a ertured lugs m andare also provided with guard. flanges a, while the skirts i of the endsection a are provided with apertured lugs m and guard flanges n andp,'-tl1e guard flanges p being proportionately long and bein designed toextend into recesses 1" in the first named lugs m. The apertured lugs mreceive the threaded bolts 03, of which there is one at each side of thetire, and mounted on said threaded boltsand arranged at the outer sidesof the lugs m arenuts e throu h the medium of up to render the guardtight on the tire, or

said guard may be increased in length so as to permit of its readyremoval from-the tire. It will also be observed that by manipulation ofthe nuts e, the guard may be expeditiously and easily fitted to tires ofdifferent sizes. The bolts and nuts being arranged within theguard-flanges p and n, it follows that said bolts and nuts will beprotected against injury by said flanges.

' I have entered into a detailed description of the construction andrelative arrangement of par ts embraced in the present "andpreferredelnbodiment of my invention in order to impart a full, clearand exact understand- I in 2' of the said embodiment, but it is obviousem, 1s

that in the future practice of the invention such changes ormodifications may be made as do not involve departure from the scope ofthe invention as defined in the; claim appended. I Having described myinvention, what I claim and desire to secure by LettersaPat- In anexternal guard for neumatic tires the combination of a plum ity ofsections each of which has a longitudinal central por-' tion, a knuckleat one end thereof, s aced knuckles at the opposite end of said'ongitudinal central portion, andfcurviline aft skirts extending fromopposite sidesof said portion and flanged at one end;'transverse pintlesextending through the alined knuckles of the sections and connecting thesections together in a hinged manner, an end section said skirts,threaded bolts arranged inside the guard flanges and extendingthrough'the apertured lugs of the two end sections, and nuts arrangedinside the'guard flanges and mounted on the bolts at the outer-sides ofghei apertured lugs, all substantially as speei-' In testimony whereof Ihave hereunto set my. hand in presence of two subscribing wltnesses. I

' JOSEPH L. LA DRIERE.

Witnesses:

' GEORGE R. CRAIG,

FRANK H. Moons.

